{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.669","julian_year":2026.669,"time":"2026-09-02T05:17:07.646Z","years_from_j2000":26.669,"frame":"date","applied":"Proper motion, then precession and nutation. The catalogued J2000 position is carried along the great circle the object's own published motion puts it on, at a constant velocity, and the result is referred to the true equator and equinox of this instant. Those are separate things: the motion moves the object, and the rotation turns the grid under it by about fifty arcseconds a year, with nutation adding up to another seventeen.","excluded":"Parallax, the radial-velocity perspective term, aberration and refraction; each is below the accuracy of the catalogued positions themselves. An object with no published proper motion comes back where the catalogue has it rather than at a fabricated zero, and says so with a null pm_ra_mas_yr. A body with no fixed position is not propagated at all — its place comes from an ephemeris, which is what /api/v1/visible answers with."},"slug":"ic-3203","name":"IC 3203","class":"spiral_galaxy_sb","category":"galaxy","object_type":"Spiral galaxy Sb","mag":15.43,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":342030962.70540464,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":185.440125,"dec_deg":25.884666666666668,"epoch_ra_deg":185.778173,"epoch_dec_deg":25.735687,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Coma Berenices","discovered":"1903","featured":false,"url":"https://spacecatalog.org/object/ic-3203","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":15.43,"h_mag":10.84,"j_mag":11.7,"k_mag":10.53,"redshift":0.02304,"hubble_type":"Sb","wikidata_id":"Q3687611","redshift_cmb":0.02404830332955643,"discovered_by":"Max Wolf","ngc_type_code":"G","uncertainties":{"distance_ly":[19809698.588289995,19809698.588289995]},"major_axis_arcmin":1.31,"minor_axis_arcmin":0.22,"position_angle_deg":146,"surface_brightness":23.55,"radial_velocity_km_s":6828},"designations":[{"catalog":"2MASX","designation":"2MASX J12214567+2553045"},{"catalog":"IC","designation":"IC 3203"},{"catalog":"LEDA","designation":"LEDA 39984"},{"catalog":"MCG","designation":"MCG +04-29-067"},{"catalog":"PGC","designation":"PGC 39984"},{"catalog":"SDSS","designation":"SDSS J122145.62+255304.7"},{"catalog":"UGC","designation":"UGC 7419"}],"source":{"id":"openngc","name":"OpenNGC","url":"https://github.com/mattiaverga/OpenNGC","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-01T22:58:55.274Z","attribution":"Data from SpaceCatalog.org. Individual records carry their source and license in `source`; attribution is required for CC-BY and CC-BY-SA rows."}